Monitoring burials of Cromlech in north western of Iran and the role of geomorphology and their distribution knowing the characteristics of the natural environment and the capabilities of land forms on the earth s surface is very important for identifying the routes of nomadic peoples. Cromlech burials, as one of  the types of  Megalithic graves, can be placed as an indicator in the study of the movement on nomadic peoples in the north west of  Iran . Cromlech is an architectural construction of  the use of large stones in defining the culture of Megalithic graves and generally,  it is used for circular stone rings that contain a burial. This type of burial in north west of Iran can be classified in to four types: simple Cromlech, hill Cromlech, covered Cromlech and standard Cromlech. This research examines the characteristic of environmental factors and geographical environment, And their role in the distribution of Cromlech Megalithic grave in the north west of Iran in a descriptive- analytical way. Based on the investigations,  have been identified so for in the northwestern area of Iran, such as: zardkhaneh, Niaraq, Gilvan, and zino castle. The main problem of this research is the analysis of geomorphic factors and components in location selection with patterns that are suitable for the life of nomadic tribes dependent of livestock and the manifestation of interaction between tribes and the physical environment. The questions of this research are:1. The in fluence of the structural structure of Cromlech burials on the natural environment and under the in fluence of which environmental, How can it be presented?2. In which areas and under the in fluence of which environmental factors was the spread of Cromlech burials in the northwest of Iran?This research will investigate the structural, structures of graves in northwest Iran using Geographical information system (GIS) software, the distribution of  burials and the in fluence of Geographical factors on materials, livelihoods and the path on nomadic tribes in their Geographical area.